Red, mate (7)

I believe the answer is:

comrade

I believe this clue is a double definition.

'red' is the first definition.
(thesaurus)

'mate' is the second definition.
(thesaurus)

(Other definitions for comrade that I've seen before include "Fellow member of the armed forces" , "Companion" , "Ally" , "Fellow soldier" , "Fellow-in-arms" .)

I've seen this clue in the Evening Standard.

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